You're correct, most applications do. QoS/CoS services are best when clearly spelled out in service agreements. Providers may clear markings, but likely becau

You're correct, most applications do. QoS/CoS services are best when clearly spelled out in service agreements. Providers may clear markings, but likely because either they don't want to have a free for all when it comes to their queues, or because they didn't purchase the gear that offers the rich queuing needed.